psr-36_x manual
Contents
1. i Neuralynx High Density Electrophysiology J Recording Systems PSR 36 X User Manual Powered Slip Ring Commutator For Maximum Subject Freedom of Movement Document Revision 1 00 Last Revised December 11 2007 Neuralynx Inc 4055 Valley Commons Dr Suite G Bozeman MT 59718 Phone 406 585 4542 Fax 406 585 9034 www Neuralvnx com support Neuralynx com Table of Contents I Document OVeLV IEW x c22 5 a atic eee idea eiecu ete eee 3 2 PSR 30 AXA OA th re cen ete ee eee eee eran eer ree ree 3 F O ANY agetera cence ener tatectesesen ela ane dtu een ae ae einen eee 4 AEE AW A acetate raed E aida aa ued ac E ean ated 5 4 1 SPECE AUTO INS ee E N earned 5 4 2 Board CONMECIOLS and Piia a a a cocaine 5 4 2 1 Motor Ontromer Boarder RN EE EEES 5 422 Connsuranon Headers a tata ieei tics 6 4 2 3 Input and Output COnneCtors issic a 6 4 2 4 Power Supply and 3 pin Power Connector ccccccccccssseeeeeeeeeeeeeeaeeeeees 7 I Pm Me PSR 0 As tal pene eatuten E S ee eease date memiales 8 5 1 Pre Configuration Steps for upgrade kits ONLY eeeeeeeecceeceeeeeeeeeeeeeeeeeeaes 8 5 2 Configuring and Testing Your PSR for upgrade kits only ce eeeeeeeeeeeeeee 11 S2 The Speed Rin deora PSR epr a O A 11 53 2 2 COnN Uri NON o E ndneadadriienzouetet 11 a2 TOST 01 Seeger ener eee rere ee ener re ter PTE RTT ene ee meron te Cpr Tn ene eee 11 5 2 4 RecOnneuration Tips acesse a 12 33 MOUNN seats deco a eee ton da2. December 1 2007 are pre configured at Neuralynx Sections 5 1 and 5 2 on configuration and testing are only needed by those interested in upgrading PSR s purchased before the above date 2 PSR 36 X Overview The PSR 36_X uses a slip ring commutator to allow rotation of the signal tether while the signal cabling to the Digital Lynx Data Acquisition System remains stationary A precision sensor monitors any twisting force on the tether so the PSR can respond immediately to animal movement and keep the signal tether untwisted This minimizes the impact of the tether on animal behavior and eliminates stress on the tether e New Tether New PSR s use flex circuit tape tethers instead of individual wires bundled in a black sleeve Flex circuits are extremely durable but an even greater benefit is that they have very low torsional stiffness This improves the precision and sensitivity of the optical torque sensor to subject movement It also eliminates the resistance exhibited by heavier more rigid tethers Each flex circuit tether connects to one headstage A PSR 36_X supports 1 to 5 tethers where X indicates the number of tethers e Improved Motor Controller Board The first version of the controller board provided quick response and fixed rate rotational adjustment to animal movement The revised board adds smooth motor speed ramping and user configurability making the PSR even more responsive and increasing its range of speed See secti
3. designed to be mounted above an experiment location usually at the ceiling of the experiment room The PSR platform should be mounted as parallel to the floor as possible Vibration in the mounting structure can cause the torque sensor to shift enough to cause motor rotation If this happens with nothing attached to provide counter torque the motor will spin continuously until counter torque is applied or power is removed The chance of this unintended rotation occurring can be reduced by using the sensitivity threshold jumpers Due to the difficulty of locating the Cheetah system near the ceiling the PSR is always used with the Neuralynx tether extension which also protects the delicate wiring from damage in a potentially hostile ceiling environment The Neuralynx headstage buffers are able to drive up to 25 feet of tether extension cable with no increase in system noise In most cases the use of the PSR and extension cabling should be transparent to the performance of the system It is suggested however that the power cabling for the PSR be run at least half of one meter away from the tether extension along its entire length in order to avoid conducting power supply noise into the electrode signals This is nota hard requirement but is strongly recommended The flex circuit tether exiting the bottom of the PSR is connected to the headstage tether using the appropriate adapter board The tether and headstage assembly are usually left plugged
4. in place by two padded bar clamps If you use bar clamps be sure not to clamp down the metal housing it will be removed in the next Step Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 8 Figure 5 2 Securing the PSR 3 Remove the four Philips screws that hold down the housing Before removing the housing it 1s important to note that within the housing is a 3 pin power connector that is fixed to the housing and connected to the motor controller board Carefully lift the housing up off the PSR platform and rest it near enough to not tug on the 3 pin power connector Figure 5 3 PSR Housing Partially Removed Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 9 4 Remove the 3 pin power connector from the motor controller board and push the MDR 50 connector s through the grommet in the metal housing Figure 5 4 and 5 5 Move the housing to a safe place out of the way 5 7 F me R i R el 2 oo Ten a CLC a a lt a hy i ai om E mip j hs a E main pi P eo To o a Figure 5 4 Removing the Power Connector Figure 5 5 Pushing MDR 50 Connector through Grommet 5 Disconnect the remaining two connectors They are plugged into ports on the motor controller board labeled JSENSOR and JMOTOR 6 Remove the four standoff screws that secure the controller board Replace the current board with the motor controller board included in your upgrade kit 7 Reinsert
5. Two pins configure the sensitivity threshold Increasing this threshold can reduce unintended commutator rotation in environments prone to vibration The three pins labeled man connect to an optional control used to rotate the PSR manually P a p F F E E 4 So GILS ILS velo Ile Ile Coto io iol io Pe follea titolo lle i min max ac vP p ym epu a Rly c snh man Figure 4 2 Jumper Configuration Banks See section 6 Jumper Settings for a table of all jumper settings 4 2 3 Input and Output Connectors An appropriate adapter or jumper board is required to join the PSR tether to a headstage tether Figure 4 3 shows three examples 2446276366 330 3603904276 750 760 3103402370900 4 Jo 230 260 2903203503680410440 TTT Neuralyns zv06 Rev 0 KULLLLLLLLI ot ae Figure 4 3 PSR Tether Connectors Flex to uDB 37 left Flex to Flex Jumper center Flex to Omnetics right Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 6 The acquisition signals that are passed through the PSR exit the PSR housing on to 5 cables terminated with MDR 50 connectors MDR 50 extension cables can then be used to run these signals to a Digital Lynx system Figure 4 4 MDR 50 Connector 4 2 4 Power Supply and 3 pin Power Connector The PSR 36_X is powered by an AC to 12VDC power adapter that is included with the PSR The PSR 36_X power port is easily fou
6. e second to several seconds 5 2 2 Configuration If you purchased your PSR after December 1 2007 it is already configured and you may proceed to section 5 3 Mounting The motor controller board included in an upgrade kit comes with no jumpers installed With no jumpers installed the PSR will operate at the lowest minimum speed lowest maximum speed the lowest acceleration rate and the highest sensitivity threshold The following section 5 2 3 Testing explains how to select the best jumper configuration for your PSR Section 6 Jumper Settings contains a table of all jumper settings and one example configuration 5 2 3 Testing If at any point the motor is driven too fast it will stop turning vibrate and make a buzzing noise This can be stopped by manually rotating the tether back to its start position or removing power For each configuration of jumpers you try these steps should be followed to test it 1 After making sure the tether is hanging free from the PSR with no torque or tension on it apply power Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 11 5 2 4 Start the motor by lightly touching or pushing the tether near where it enters the PSR Without counter torque the motor will rotate indefinitely but that is what we want for this test Watch the motor accelerate to a constant speed Try this several times in each direction Holding the tether will apply the counter torque required
7. in after mounting The animal is disconnected and reconnected to the hanging tether and headstage each day Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 13 6 Jumper Settings In the Jumper Setting columns a 1 indicates the presence of a jumper Speed PPS Setting a 20 000 N Ooo 4 O o o 5 J 100 o 6 J 0 8 m Speed PPS degrees 80 000 o 3 O 00 o 29 J Figure 6 1 Jumper Settings Figure 6 2 shows an example configuration with minimum speed set to 100 for 5OPPS 011 for a maximum speed of 125PPS 001 for an acceleration rate of 2 and 01 to set the sensitivity threshold to 6 degrees gt e i a E 2 min max acc sn Figure 6 2 Example Jumper Configuration Individual PSR s are not guaranteed to start at all minimum speeds or be capable of ramping up to all maximum speeds Each PSR s speed range will depend on its physical characteristics Using the jumpers effectively provides many working configurations Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 14
8. nd on the outside of the metal PSR housing Upgrading a PSR requires removing the metal housing along with the 3 pin power connector that is fixed to it A separate 3 pin power connector Figure 4 5 is provided with PSR upgrade kits to allow powering of the motor controller board with the housing completely removed Figure 4 5 3 Pin Power Connector Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 7 5 Using the PSR 36 X The PSR is fully self contained Once power is applied it will always attempt to align the cables to remove any torque on them relative to the start position Because the start position is determined at the moment power is applied it is important to apply power only after making sure that the cables are untwisted and without any torque on them If you purchased your PSR after December 1 2007 it is already configured and you may proceed to section 5 3 Mounting 5 1 Pre Configuration Steps for upgrade kits only Required tools and parts PSR 36_X 3 pin power connector 12VDC power supply up to 11 jumpers Philips screw driver Recommended tools one or two padded bar clamps 1 Carefully disconnect and remove your PSR from where it is mounted 2 Find a stable place to temporarily and securely mount your PSR Figure 5 1 shows a typical test setup This PSR platform spans two tables at about waist level Figure 5 1 Temporary Mounting of PSR In this example the platform is held firmly
9. nes for power and internal sensors e Tether Connector s 1 to 5 flex circuit jumper boards or the appropriate tether adapter board s for headstages without a flex circuit output Output Connector s 1 to 5 MDR 50s Power 12VDC Accessories AC to 12VDC power adapter 3 pin power connector 12 jumpers Motor Speed Range User configurable from 20 300 Pulses Per Second PPS This is equivalent to 4 60 Revolutions Per Minute RPM Torque Sensor Responsiveness User configurable from 3 to 12 degrees e Auto or Manual Control Modes Contact Neuralynx to request a manual control remote 4 2 Board Connectors and Parts 4 2 1 Motor Controller Board The motor controller board contains the interface to the signal cable torque sensor the stepper motor drive circuitry and a Xilinx device to control the stepper motor based on sensor inputs It also contains two connector headers the user must locate if upgrading their PSR a 3 pin power header and a 34 pin jumper configuration header Figure 4 1 Motor Controller Board Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 5 4 2 2 Configuration Header Four banks of jumper inputs allow the user to tailor the PSR performance to the characteristics of their experiment and conditions of their lab environment Each bank of jumpers represents a different parameter the user can adjust There are three pins each for configuring minimum speed maximum speed and rate of acceleration
10. on 5 2 1 The Speed Range of a PSR for details The new controller board also supports an optional remote for manually controlling the direction of PSR rotation The PSR s quieter and smoother operation also reduces noise in the lab and vibration in the tether Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 3 3 Glossary Digital Lynx Data Acquisition System Hardware interface for low noise neural data acquisition using flexible referencing Powered Slip Ring Commutator PSR Rotating motor controlled cylinder that allows torque free rotation of the signal tether passed through it Fine Wire Tether Wires bundled together coaxially in a protective sleeve Flex Circuit Wires grouped closely side by side in a flexible durable and lightweight tape Headstage Low noise unity gain buffer amplifiers placed near the recording site of an electrode Slip Ring Conductor that bridges the connection between fixed wires entering the PSR cylinder and matching wires that extend from the rotating end of the PSR cylinder Tether Signal cabling that leaves the bottom of the PSR and connects to a subject headstage New PSR s use flex circuits Older PSR s such as the PSR 42 and PSR 76 have fine wire tethers Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 4 4 Hardware 4 1 Specifications e Signals per Headstage 41 signal lines including stimulus and references 12 li
11. tca ab eassgnaliemieaaasuaceetemnce 13 Ox Jmeno tT e S 14 List of Figures and Tables Fieune 4 1 Motor Controller Bodi diesseis a A A 5 Figure 4 2 Jumper Configuration BankSisircsinaecsen i E 6 Figure 4 5 PSR Tether OnNeClOIS arunse e a ENO 6 Preure 4 4 MDR SOC ONNOC tO os a a E E ele 7 Pieure 425 9 Pin Power One CiOn rein E A 7 Freure Sal Tempora y Mounino Ol PS Reene a See cls eoeceoreicen teense dias eewsseees 8 Figure 522 S CUurme he PS Rosiere e E E 9 Figure 5 3 PSR Housing Partially Removed nsoesssesennsssssssseeeerssssssssceerssssssssereressssssees 9 Pieure 5 4 Removing the Power OnNeClOL serate nnana a aE 10 Figure 5 5 Pushing MDR 50 Connector through Grommet sssseeeeeeeeessssssssssssseeseees 10 Figure 5 6 Gently Gripping the Flex Tether eccccccccccccceseseeeeceeeeeeaaeesseeeeeeeeeeaas 12 Foure 62 IM per Set i S enana steed ingranacs aeheeedueroes dor stacddanraaeeaees 14 Preure 6 2 Example Jumper Cone uration erene a aan R 14 Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 2 1 Document Overview This document describes the hardware operation configuration and mounting of the Powered Slip Ring Commutator PSR 36_X It also describes the improved motor controller board and tether used in PSR 36_X s Users of PSR s purchased before December 1 2007 like the PSR 42 and PSR 76 can upgrade to the new motor controller board by contacting Neuralynx PSR s purchased after
12. the standoff screws Be careful over tightening the screws can damage the board 8 Reconnect the 5x2 pin JSENSOR connector and the 8x2 pin JMOTOR connector Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 10 9 Plug the supplied 3 pin power connector into the motor controller board The connector is keyed so it can only be inserted one way Wait until section 5 2 3 Testing to connect the 12VDC power supply to the 3 pin power connector 5 2 Configuring and Testing Your PSR for upgrade kits only 5 2 1 The Speed Range of a PSR To begin rotation the stepper motor that drives the PSR must overcome the friction of the commutator slip rings and the mass of the slip ring assembly and cover The friction and mass increase as the number of channels increase Because stepper motors are only rated for a specific level of torque they must be started at a low enough speed to overcome the static resistance This is the purpose of the minimum speed configuration jumpers Because this starting speed may be too slow to track some animals a PSR can accelerate up to a user selectable maximum speed The physical characteristics of the PSR limit the maximum achievable speed If the time to ramp from minimum speed to maximum speed is undesirably low the acceleration jumpers can be used to reduce this time Depending on the size of your PSR and its jumper configuration time to reach maximum speed can range from less than half of on
13. to stop rotation A 5 f Figure 5 6 Gently Gripping the Flex Tether Gently pinch the tether where it enters the PSR Rotate the tether in both directions at varying distances from only enough to start the motor up to several complete revolutions Remember that when you rotate the tether the length of the tether inside the PSR is twisting as the PSR continually untwists it Try turning the tether back and forth only a small distance to observe the ability of the motor to start stop and change direction quickly Remove power Reconfiguration Tips If the motor does not stall at any point you have a working configuration and can either o experiment with increasing your minimum speed maximum speed and acceleration o or reassemble your PSR and proceed to section 5 3 Mounting To reassemble your PSR carefully pull the MDR 50 connector s back through the grommet on the PSR housing reconnect the 3 pin power connector attached to the housing and then remount the housing to the PSR platform If the motor buzzes and will not turn at all try lowering your minimum speed If the motor begins rotating but stalls during acceleration try lowering the maximum speed If the motor begins but stalls quickly after the initial movement try reducing the rate of acceleration Repeat section 5 2 3 Testing after changing jumper settings Neuralynx Inc PSR 36_X User Manual Rev 1 00 December 11 2007 Page 12 5 3 Mounting The PSR is
Download Pdf Manuals
Related Search